The image below depicts the nephron and the collecting duct. Identify the portion outlined in red. 
Definitions:
Private Securities Litigation Reform Act
A 1995 United States federal law that increased the standards for initiating securities fraud litigation to protect companies from frivolous lawsuits.
Illegal Conduct
Activities or actions that are forbidden by law, regulations, or statutes.
Public Company Accounting Oversight Board
A nonprofit corporation established by Congress to oversee the audits of public companies in order to protect investors and the public interest.
Public Investors
Individuals or entities that invest in publicly traded securities, such as stocks and bonds, available in financial markets.
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